Improvement in machines for trimming boot and shoe heels



ZSheets-S'het 1;. M. A. TYLER.

Maohinefor' 'Trimming Boot and Shoe Heels.

No. 203,510 Patented May 7,1878..

N. PETERS, PHOTO-LY'I'IGRAPNER, WASNINGON, D4 C.

, 2 Sheets-Sneenv M. A. TYLER.. Machine for Trimming Boot and Shoe Heel-s. NO. 203,510.

Patented May 7, 1878.

Wl TNESSES.

UNITED STATns'PATr-:N'r OFFICE.

MERRILL A. TYLER, OF NEM,T DURHAM, NEW HAMPSHIRE.

IMPROVEMENT lN MACHINES FOR TRIMMING BOOT AND SHOE HEELS.

Specification forming part of Letters Patent No. 203,510, dated May' 7, 1878 application filed January 31, 1878.

To all 'whom it may concern:

Be it known that I, MERRILL A. TYLER, of New Durham, county of Stafford, State of New Hampshire, have invented certain new and useful Improvements in Machines for Trimming Boot and Shoe Heels, of which the following is a specification:

This machine is constructed and arranged for the boot or shoe the heel of which is to be trimmed to be held stationary, and the trimming-knife to be carried about the outer edge of the heel; and the invention consists in the construction and arrangement of the several parts, all substantially as hereinafter described, reference being had to the accompanying plates of drawings, in which- Figure l is a side elevation; Fig. 2, a horizontal section on line o o, Fig. 1; Fig. 3, a vertical section on line x w, Fig. 2; Fig. 4, a vertical section on line y y, Fig. 2 5 Figs. 5, 6, 7, 8, 9, and 10, views in detail.

In the drawings, A represents a base-plate, from one end of which runs a standard, B, having a vertical tubular head, C; D, a vertical plug, moving through the tubular head C, and acted upon by the turning of a screwshaft, E, which screw-shaft E has its lower end connected to the upper end of the plug by a circumferential groove, a, of the screwshaft E, and a set-screw, b, of the plug, so that the plug will ,follow the screw and not turn with it, and this movement of the plug is still urther insured'bjr a vertical spline-joint, d, between it and its bearing in the tubular head C F, a plate, fastened to bed-plate A, so that the center of the circular raised block Gr will be coincident with the vertical axis of the vertical moving plug D.

This circular raised portion G has two vertical pins, fg, over which sit two plates, h Z, which plates rest one upon another, and the lower one, h, which has two cam-surfaces, m n,

y to be hereinafter described. The upper plate,

l, of these two plates corresponds in outline to the circumferential outline of a boot or shoe heel.

The boot or shoe lastedthe heel of which is to be trimmed-is placed by its heel on the plate l, and its front edge brought against the raised cross-ridge Z2, and otherwise the heel centered thereon, when the plug D is brought down upon the last, which binds and secures the .heel in its said position, to be trimmed about its outer circular edge by the trimmingknife, which is arranged and operated as will be now described.

H, an arm, hung by its yoke portion J about the raised circular block Gr, so as to be swung horizontally about it as a center, and in its said swing it rests on the plate F below the block G. This arm-yoke J, at its bearing oV about the raised block Gr, is diametrically divided into two parts, J1 and J 2, arran gedl to slide upon each other, as at K, and are heldtogether by the spiral springs p, which are confined on stems p of the part, J1, between a screw-nut, q, on each of said stems, and one ear-piece, g1, of the two ear-pieces on the part J 2, and through which said stems play. The said two-part bearing is kept closed by these spiral springs; but, obviously, can be opened against said springs p by a power applied to either one or the other of the said two parts in the proper direction therefor.

M, an arm, pivotedat r to the upper surface of the part J of the two-part bearing-yoke J. This arm M, at one end, s, bears upon the periphery of the upper plate l of the two plates h L upon the raised circular block Gr, about which the yoke J swings, and at the other end, t, it bears only upon the periphery of the lower and cam plate h of said two plates, and between its said two bearing ends it carries a knife-blade, N, and a guard, O, each constructed and arranged together as follows: The knife-blade N is convex from end to end, and it extends across the opening between the two arms u o of a frame, P, and it is secured to each arm by a set-screw, w. The frame P, by its stem as, a continuation of one, o, of its arms u o, swivels in an ear-piece, a', which in turn swivels in the carrying-arm M, and thus the .knife-blade can swivel upon the carrying-arm M in two directions-it, vertically, and,second, horizontally. The knifeblade stands vertically against the boot or shoe heel, secured on the plates h Z, and in this position its cutting-edge b is convex rel-l atively to the outline of the heell from the treading-face of the heel to the upper of the Aboot or shoe.

The guard or gage O for the knife-blade N is carried by the knife-frame P, and by one end, O', it is hung by a screw-pivot, P2, to an arm, P1, so that it can be swung thereon and yet be fastened against turning. This arm P', to which the guard-arm O-is hung, is arranged to be slid along the cross-piece P3 of the knifeframe P, and it is fastened thereon in the position desired by tightening up a thumbscrew, P4, which passes through a slot, c, in the length of the said cross-piece P3, and enters and screws into said arm P1.

The guard or gage O, applied as above described, obviously can be adjusted on the knife-frame P in a vertical direction in relation yto the cutting-edge of the knife, and to act, not only as a guard to the knife against cutting the upper of the boot or shoe in its cutting of the heel to trim it, but also as a guard to the knife against its trimming the heel beyond its position of bearing thereon, all as will hereinafter fully appear.

d1 d2, two set-screws arranged in knife-frame P to bear upon the knife-blade, so that by turning them the cutting-edge of the knife can be'put at a greater or less degree of start relative to the edge of the heel it is to trim, the vfastening-screws fw being rst loosened for this purpose, and then after such adjustment tightened, to fix the knife against movement.

f1, a block fastened to screw knife-frame P, and f2 an adjusting-screw for said block. This block f1 is at the lower end of the cuttingedge b of the knife when the knife is in its working position .on the heel, and by setting its adjusting-screw f 2 in or out the cut of the lower end ofthe cutting-edge of the knife-blade can be regulated at pleasure, as is obvious, to secure a smaller or larger heel at or near the treading-face of the heel. j

Having thus described the construction and arrangement of the several parts making up the present improved machine for trimming boot and shoe heels, I will proceed to describe the manner of using and operating it.

First, the boot or shoe the heel of which is to be trimmed is first lasted, and then placed by the treading-face of its heel upon the upper heel-plate l, and its front edge brought against the raised edge Z2 of said plate, and thereon itis centered coincident substantially with the vertical axis of the plug D and of the circular block G, and the heel and cam plates Zand h, which are placed thereon. The boot or shoe is then fastened in place, as hereinbefore described, and then the yoke-arm 'J is swung around, so as to bring the cuttingedge b of the trimming-knife at one corner, z, of the front face of the heel, when, having adjusted the guard O either to bear upon the upper of the boot or shoe just above the heel, or to bear upon the heel at its upper part and the lower knife-regulating block f1, as desired,

madeas perfect as desired. In this movement of the trimming-knife about the heel it is held in close contact therewith by the action of the spiral springs p, which are arranged upon the yoke-arm p', as described; and when the end vof the knife-carrying arm M comes opposite to, and to a bearing on, either of the cam-faces m a of the lower plate h of said heel-plates h l, the arm m then swings on its center r, and in each case this swing of the arm M throws the cutting-edge of the knife inward and-toward the center of the heel, whereby, under a location and form of cam-faces m u such as shown in the drawings, Fig. 5, the heel is trimmed at each corneiof the front face of the heel to the shape desired.

The heel-plates h l, inlieu of being in two pieces, may be in one piece 5 and, again, they may be in various sizes and shapes, as is obvious.

rPhe bearing end D of plug D is hollowed out from frontto rear, as shown lin Fig. 8, thereby securing a square and firm bearing of the plug on the last, which is desirable, in order to rigidly hold the boot or shoe for thc operation of the heel-trimming knife.'

In Figs. 9, 10 is shown a modification in the elastic connection of the two-part yoke-bearing, which is obvious from the drawing without description, and, again, plain to be seen, to be and to act substantially the same as the elastic connection which has been herein particularly described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-v l l. The knife-carrying yoke J, composed of the two parts J1 J 2, arranged to slide upon each other, and held together by spring-pressare, in combination with the bearing-block G and a suitable operating-handle, substantially us described. v

2. The knifeblade swiveled to a carryingarm, M, which is pivoted to a two-part yokebearing, J, having its parts joined together by an elastic connection, substantially as described, for the purpose specified.

3. The combination of the adjustable knifeblade N, its fastening-screws w w', and the adjusting-screws d1 d2, substantially as and for lthe purpose set fort 4. The knife gage or guard O, combined with the knife -frame P, made adjustable in relation to the cutting-edge of the knife, substantially as described.

5. The combination of the swiveling frame P, swivelin g ear-piece a', and carrying-arm M,

substantially as and for the purpose set forth.

6. The combination, with the b1ookf1,ar ranged at the lower end of the knife, of the adjusting-screwfz, substautially as and for the purpose set forth.`

7. The heel-plate h, provided with the camfeoes m m, substantially as and for the purpose set forth.

8. The plug D, having its lower or bearing end D hollowed out, substantially as and for I the purpose specified.

MERRILL A. TYLER.

Witnesses:

FRANKLIN HAYES, NEHEMIAH B. HAYEs.- 

